如何高效的將excel導(dǎo)入sqlserver？

大部分人都知道用oledb來讀取數(shù)據(jù)到dataset，但是讀取之后怎么處理dataset就千奇百怪了。很多人通過循環(huán)來拼接sql，這樣做不但容易出錯(cuò)而且效率低下，System.Data.SqlClient.SqlBulkCopy 對(duì)于新手來說還是比較陌生的，這個(gè)就是傳說中效率極高的bcp，6萬多數(shù)據(jù)從excel導(dǎo)入到sql只需要4.5秒。
    using System;
    using System.Data;
    using System.Windows.Forms;
    using System.Data.OleDb;
    namespace WindowsApplication2
    {
    public partial class Form1 : Form
    {
    public Form1()
    {
    InitializeComponent();
    }
    private void button1_Click(object sender, EventArgs e)
    {
    //測(cè)試，將excel中的sheet1導(dǎo)入到sqlserver中
    string connString = "server=localhost;uid=sa;pwd=sqlgis;database=master";
    System.Windows.Forms.OpenFileDialog fd = new OpenFileDialog();
    if (fd.ShowDialog() == DialogResult.OK)
    {
    TransferData(fd.FileName, "sheet1", connString);
    }
    }
    public void TransferData(string excelFile, string sheetName, string connectionString)
    {
    DataSet ds = new DataSet();
    try
    {
    //獲取全部數(shù)據(jù)
    string strConn = "Provider=Microsoft.Jet.OLEDB.4.0;" + "Data Source=" + excelFile + ";" + "Extended Properties=Excel 8.0;";
    OleDbConnection conn = new OleDbConnection(strConn);
    conn.Open();
    string strExcel = "";
    OleDbDataAdapter myCommand = null;
    strExcel = string.Format("select * from [{0}$]", sheetName);
    myCommand = new OleDbDataAdapter(strExcel, strConn);
    myCommand.Fill(ds, sheetName);
    //如果目標(biāo)表不存在則創(chuàng)建
    string strSql = string.Format("if object_id('{0}') is null create table {0}(", sheetName);
    foreach (System.Data.DataColumn c in ds.Tables[0].Columns)
    {
    strSql += string.Format("[{0}] varchar(255),", c.ColumnName);
    }
    strSql = strSql.Trim(',') + ")";
    using (System.Data.SqlClient.SqlConnection sqlconn = new System.Data.SqlClient.SqlConnection(connectionString))
    {
    sqlconn.Open();
    System.Data.SqlClient.SqlCommand command = sqlconn.CreateCommand();
    command.CommandText = strSql;
    command.ExecuteNonQuery();
    sqlconn.Close();
    }
    //用bcp導(dǎo)入數(shù)據(jù)
    using (System.Data.SqlClient.SqlBulkCopy bcp = new System.Data.SqlClient.SqlBulkCopy(connectionString))
    {
    bcp.SqlRowsCopied += new System.Data.SqlClient.SqlRowsCopiedEventHandler(bcp_SqlRowsCopied);
    bcp.BatchSize = 100;//每次傳輸?shù)男袛?shù)
    bcp.NotifyAfter = 100;//進(jìn)度提示的行數(shù)
    bcp.DestinationTableName = sheetName;//目標(biāo)表
    bcp.WriteToServer(ds.Tables[0]);
    }
    }
    catch (Exception ex)
    {
    System.Windows.Forms.MessageBox.Show(ex.Message);
    }
    }
    //進(jìn)度 設(shè)為首頁(yè) 顯示
    void bcp_SqlRowsCopied(object sender, System.Data.SqlClient.SqlRowsCopiedEventArgs e)
    {
    this.Text = e.RowsCopied.ToString();
    this.Update();
    }
    }
    }
    上面的TransferData基本可以直接使用，如果要考慮周全的話，可以用oledb來獲取excel的表結(jié)構(gòu)，并且加入ColumnMappings來設(shè)置對(duì)照字段，這樣效果就完全可以做到和sqlserver的dts相同的效果了。